EP0245112A3 - Film perforating apparatus - Google Patents

Film perforating apparatus Download PDF

Info

Publication number
EP0245112A3
EP0245112A3 EP87304116A EP87304116A EP0245112A3 EP 0245112 A3 EP0245112 A3 EP 0245112A3 EP 87304116 A EP87304116 A EP 87304116A EP 87304116 A EP87304116 A EP 87304116A EP 0245112 A3 EP0245112 A3 EP 0245112A3
Authority
EP
European Patent Office
Prior art keywords
electrodes
electrode
discharge
film
spark discharge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP87304116A
Other languages
German (de)
French (fr)
Other versions
EP0245112A2 (en
Inventor
Alan James Clegg
John Colin Dinsdale Smith
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bcl Ltd
Original Assignee
Bcl Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bcl Ltd filed Critical Bcl Ltd
Publication of EP0245112A2 publication Critical patent/EP0245112A2/en
Publication of EP0245112A3 publication Critical patent/EP0245112A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/26—Perforating by non-mechanical means, e.g. by fluid jet
    • B26F1/28—Perforating by non-mechanical means, e.g. by fluid jet by electrical discharges

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

The invention is concerned with an apparatus and a process for perforating synthetic plastics film, for example polyethylene or polypropylene, with an electrical spark discharge set up between a set of first electrodes which may be pointed rods and second electrodes which also may be complementary pointed rods or a single electrode which may be an electrically conducting guide plate, vane or roller. The film is drawn between the first and second electrodes. Each first electrode is supplied with high voltage sufficient to cause the spark discharge from a separate charged capacitor whereby each first electrode is electrically isolated from the others and thus a discharge from one first electrode does not prevent the formation of discharges from the other electrodes. The charging and discharge of the capacitors is controlled by a series of coupled switching units.
EP87304116A 1986-05-08 1987-05-08 Film perforating apparatus Withdrawn EP0245112A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8611256 1986-05-08
GB08611256A GB2190028A (en) 1986-05-08 1986-05-08 Perforating plastics film

Publications (2)

Publication Number Publication Date
EP0245112A2 EP0245112A2 (en) 1987-11-11
EP0245112A3 true EP0245112A3 (en) 1990-02-07

Family

ID=10597528

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87304116A Withdrawn EP0245112A3 (en) 1986-05-08 1987-05-08 Film perforating apparatus

Country Status (3)

Country Link
EP (1) EP0245112A3 (en)
AU (1) AU7263587A (en)
GB (1) GB2190028A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5308180A (en) * 1991-12-09 1994-05-03 Minnesota Mining And Manufacturing Company Liquid applicator with metering insert
CN1125410A (en) * 1993-06-11 1996-06-26 明尼苏达矿产制造公司 Laser machined replication tooling

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2545208A (en) * 1946-04-19 1951-03-13 John W Meaker Electrical perforating apparatus
FR1393500A (en) * 1964-02-12 1965-03-26 Papiers Abadie Sa Des Device for electric perforation of sheet materials
US3385951A (en) * 1966-05-20 1968-05-28 Du Pont Apparatus for perforating and bonding moving sheets of material by electrical discharges
US3419752A (en) * 1964-09-11 1968-12-31 Philips Corp Multiple spark printer
DE2410060A1 (en) * 1974-03-02 1975-09-11 Texmato Ges Fuer Automatisieru Appts. for perforating sheets esp. synthetic leather - with pointed working electrode controlled by circuit and counter electrode
DE2523608A1 (en) * 1975-05-28 1976-12-02 Fraunhofer Ges Forschung Cigarette paper perforator using electrical spark discharges - produces constant number of holes per unit area at different paper web speeds
FR2399307A1 (en) * 1977-08-05 1979-03-02 Molins Ltd APPARATUS FOR PUNCHING A STRIP OF MOVING PAPER, IN PARTICULAR A STRIP OF PAPER FOR CIGARETTE TIP
CA1122266A (en) * 1981-10-14 1982-04-20 James Cross Electrical spark treatment apparatus

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1603515A (en) * 1977-08-05 1981-11-25 Molins Ltd Spark perforation of moving webs of material

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2545208A (en) * 1946-04-19 1951-03-13 John W Meaker Electrical perforating apparatus
FR1393500A (en) * 1964-02-12 1965-03-26 Papiers Abadie Sa Des Device for electric perforation of sheet materials
US3419752A (en) * 1964-09-11 1968-12-31 Philips Corp Multiple spark printer
US3385951A (en) * 1966-05-20 1968-05-28 Du Pont Apparatus for perforating and bonding moving sheets of material by electrical discharges
DE2410060A1 (en) * 1974-03-02 1975-09-11 Texmato Ges Fuer Automatisieru Appts. for perforating sheets esp. synthetic leather - with pointed working electrode controlled by circuit and counter electrode
DE2523608A1 (en) * 1975-05-28 1976-12-02 Fraunhofer Ges Forschung Cigarette paper perforator using electrical spark discharges - produces constant number of holes per unit area at different paper web speeds
FR2399307A1 (en) * 1977-08-05 1979-03-02 Molins Ltd APPARATUS FOR PUNCHING A STRIP OF MOVING PAPER, IN PARTICULAR A STRIP OF PAPER FOR CIGARETTE TIP
CA1122266A (en) * 1981-10-14 1982-04-20 James Cross Electrical spark treatment apparatus

Also Published As

Publication number Publication date
EP0245112A2 (en) 1987-11-11
GB2190028A (en) 1987-11-11
AU7263587A (en) 1987-11-12
GB8611256D0 (en) 1986-06-18

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Inventor name: CLEGG, ALAN JAMES

Inventor name: SMITH, JOHN COLIN DINSDALE